The death toll tied to defective Takata Corp. air bags rose to seven as Honda Motor Co. on Friday confirmed an inflater manufactured by the Japanese supplier ruptured in an April car crash that killed a Louisiana woman.

The rupture of the inflater in the driver-side air bag of the 2005 Honda Civic in Lafayette, La., “resulted in the death of the driver,” Kylan Rae Langlinais, Honda said in a statement on Friday. The vehicle was part...